Friday Harbor Airport Weather Forecast

    • 50
    • 63

    Mostly Sunny

    • 49
    • 63

    Partly Sunny

    • 48
    • 62

    Partly Sunny

    • 47
    • 60

    Mostly Cloudy

    • 47
    • 61

    Partly Sunny

    • 47
    • 61

    Mostly Cloudy

    • 46
    • 60

    Slight Chance Rain

Today 3 Oct San Juan County

Partly sunny. A slight chance of rain in the morning. Highs in the upper 50s.

Tonight 3 Oct San Juan County

Mostly clear. Lows in the upper 40s to mid 50s. Northwest wind to 10 Mph in the evening becoming light.

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Friday Harbor Airport Temperature Statistics

October Temperature

Friday Harbor Airport (0 miles)

  • Lowest 1 October, 2026

    46 °F

  • Average October

    54.1 °F

  • Highest 1 October, 2026

    60.1 °F

Climate (2021–2026)

Friday Harbor Airport (0 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.7 °F
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